GB2138586B - Liquid crystal device - Google Patents

Liquid crystal device

Info

Publication number
GB2138586B
GB2138586B GB08404114A GB8404114A GB2138586B GB 2138586 B GB2138586 B GB 2138586B GB 08404114 A GB08404114 A GB 08404114A GB 8404114 A GB8404114 A GB 8404114A GB 2138586 B GB2138586 B GB 2138586B
Authority
GB
United Kingdom
Prior art keywords
mixture
glass plates
cholesteryl
liquid crystal
crystal device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB08404114A
Other versions
GB2138586A (en
GB8404114D0 (en
Inventor
Francesco Simoni
Roberto Bartolino
Nicola Guarracino
Nicola Scaramuzza
Giovanni Barbero
Armando Catalano
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Consiglio Nazionale delle Richerche CNR
Original Assignee
Consiglio Nazionale delle Richerche CNR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Consiglio Nazionale delle Richerche CNR filed Critical Consiglio Nazionale delle Richerche CNR
Publication of GB8404114D0 publication Critical patent/GB8404114D0/en
Publication of GB2138586A publication Critical patent/GB2138586A/en
Application granted granted Critical
Publication of GB2138586B publication Critical patent/GB2138586B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/13718—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on a change of the texture state of a cholesteric liquid crystal
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/36—Steroidal liquid crystal compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Nonlinear Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)
  • Liquid Crystal Substances (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

A liquid crystal device for continuous rotation of the selective polarization of monochromatic light is provided by a cholesteric mixture with positive dielectric anisotrophy contained between a pair of glass plates which are conductive on the surface in contact with the mixture and have received a surface treatment to provide planar orientation for the mixture. A voltage is applied between the two glass plates and an input light polarizer is applied to one of the two glass plates. The device preferably uses a cholesteric mixture comprising cholesteryl chloride (31.2%), cholesteryl oleyl carbonate (47.7%) and cholesteryl nonanoate (21.1%) and is advantageously employed in laboratory polarization rotators and colored display units.
GB08404114A 1983-04-20 1984-02-16 Liquid crystal device Expired GB2138586B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT84111/83A IT1172826B (en) 1983-04-20 1983-04-20 LIQUID CRYSTAL DEVICE FOR THE CONTINUOUS ROTATION OF THE SELECTIVE POLARIZATION OF MONOCHROME LIGHT

Publications (3)

Publication Number Publication Date
GB8404114D0 GB8404114D0 (en) 1984-03-21
GB2138586A GB2138586A (en) 1984-10-24
GB2138586B true GB2138586B (en) 1987-01-21

Family

ID=11324145

Family Applications (2)

Application Number Title Priority Date Filing Date
GB838327537A Pending GB8327537D0 (en) 1983-04-20 1983-10-14 Liquid crystal device
GB08404114A Expired GB2138586B (en) 1983-04-20 1984-02-16 Liquid crystal device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB838327537A Pending GB8327537D0 (en) 1983-04-20 1983-10-14 Liquid crystal device

Country Status (7)

Country Link
US (1) US4579422A (en)
JP (1) JPS59195628A (en)
DE (1) DE3325414A1 (en)
FR (1) FR2544882B1 (en)
GB (2) GB8327537D0 (en)
IT (1) IT1172826B (en)
NL (1) NL8302381A (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0198716A3 (en) * 1985-04-17 1988-11-23 Laakmann Electro-Optics Inc. Variable laser beam attenuation
DE3626146A1 (en) * 1986-08-01 1988-02-11 Georg Rudolph Transparent liquid-crystal display
US4786858A (en) * 1986-12-18 1988-11-22 Xerox Corporation Liquid crystal electrostatic voltmeter
USRE36654E (en) * 1989-03-28 2000-04-11 In Focus Systems, Inc. Stacked LCD color display
US4917465A (en) * 1989-03-28 1990-04-17 In Focus Systems, Inc. Color display system
DE69021950T2 (en) * 1989-06-17 1996-03-28 Seisuke Nakano Cholesteric liquid crystal composition and color-forming liquid crystal composite materials.
US6133980A (en) 1995-10-30 2000-10-17 Metrologic Instruments, Inc. Liquid crystal film structures with phase-retardation surface regions formed therein and methods of fabricating the same
US6671008B1 (en) * 1991-11-27 2003-12-30 Reveo, Inc. Electro-optical glazing structures having scattering and transparent modes of operation and methods and apparatus for making the same
US6633354B2 (en) 1991-11-27 2003-10-14 Reveo, Inc. Spectrum-controllable reflective polarizers having electrically-switchable modes of operation
US6559903B2 (en) 1991-11-27 2003-05-06 Reveo, Inc. Non-absorptive electro-optical glazing structure employing composite infrared reflective polarizing filter
US5940150A (en) 1991-11-27 1999-08-17 Reveo, Inc. Electro-optical glazing structures having total-reflection and transparent modes of operation for use in dynamical control of electromagnetic radiation
DE4241544C2 (en) * 1992-12-10 1994-09-15 Merck Patent Gmbh Electrically switchable delay element
US6977695B2 (en) * 1997-02-26 2005-12-20 Reveo, Inc. Variable optical attenuator based on electrically switchable cholesteric liquid crystal reflective polarizers
AU4206600A (en) 1999-04-06 2000-10-23 Reveo, Inc. Electro-optical glazing structures having scattering and transparent modes of operation
US6476966B1 (en) 1999-12-15 2002-11-05 University Of Central Florida Continuously variable, wavelength-independent polarization rotator
US6674576B1 (en) * 2000-10-04 2004-01-06 Rockwell Collins, Inc. Method and apparatus for unobstructed telescopic communications

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3669525A (en) * 1971-01-06 1972-06-13 Xerox Corp Liquid crystal color filter
US3790251A (en) * 1971-11-29 1974-02-05 Xerox Corp Holding field to improve the image retention of a cholesteric nematic phase transition liquid crystal imaging system
US3833287A (en) * 1973-03-08 1974-09-03 Bell Telephone Labor Inc Guest-host liquid crystal device
US4017156A (en) * 1974-02-28 1977-04-12 Matsushita Electric Industrial Co., Ltd. Electro-optical display device
US3938880A (en) * 1974-05-28 1976-02-17 Xerox Corporation Spherulitic liquid crystalline texture
US3912369A (en) * 1974-07-02 1975-10-14 Gen Electric Single polarizer reflective liquid crystal display
US4068926A (en) * 1974-11-13 1978-01-17 Japan Suncrux Co., Ltd. Liquid crystal display device for displaying colored patterns
NL7600753A (en) * 1975-03-29 1976-10-01 Kernforschung Gmbh Ges Fuer DEVICE FOR MONITORING THE CONDITION OF FLOODABLE OR LIQUID MATERIAL.
GB1506570A (en) * 1975-07-08 1978-04-05 Secr Defence Liquid crystal devices
GB1571496A (en) * 1976-05-04 1980-07-16 Standard Telephones Cables Ltd Cholesteric liquid crystal cells
FR2356173A1 (en) * 1976-06-21 1978-01-20 Gen Electric PROCESS FOR IMPROVING THE DESCENT TIME OF A DISPLAY DEVICE COMPOSED OF NEMATIC PROPELLERED LIQUID CRYSTALS
JPS53101296A (en) * 1977-02-16 1978-09-04 Seiko Epson Corp Display unit
JPS547360A (en) * 1977-06-18 1979-01-20 Ishii Hideki Optical device
DE2827471C2 (en) * 1978-06-22 1982-09-02 Siemens AG, 1000 Berlin und 8000 München Liquid crystal cell with an induced cholesteric phase
JPS5764209A (en) * 1980-10-07 1982-04-19 Hitachi Ltd Liquid crystal display element and its manufacture
JPS5788434A (en) * 1980-11-25 1982-06-02 Keiji Iimura Liquid crystal device, and generating and erasing method of bubble
JPS5834432A (en) * 1981-08-25 1983-02-28 Asahi Glass Co Ltd Liquid crystal display element
JPS5846324A (en) * 1981-09-14 1983-03-17 Ricoh Co Ltd Liquid crystal display device of guest-host system
JPS5853979A (en) * 1981-09-28 1983-03-30 Sumitomo Chem Co Ltd Liquid crystal display element

Also Published As

Publication number Publication date
IT1172826B (en) 1987-06-18
GB8327537D0 (en) 1983-11-16
GB2138586A (en) 1984-10-24
US4579422A (en) 1986-04-01
FR2544882B1 (en) 1988-11-04
NL8302381A (en) 1984-11-16
FR2544882A1 (en) 1984-10-26
GB8404114D0 (en) 1984-03-21
JPS59195628A (en) 1984-11-06
IT8384111A0 (en) 1983-04-20
DE3325414A1 (en) 1984-10-25

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940216